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Chemical Reactions Practice Tests

These Grade 10 Science practice tests develop evidence of chemical change, reactants, products, reaction types, balanced equations, conservation of atoms, catalysts, energy changes, and reaction rates.

Skills covered

  • Identifying precipitates, gas formation, temperature changes, color changes, and other evidence of chemical reactions
  • Distinguishing reactants and products and applying conservation of matter to chemical equations
  • Classifying synthesis, decomposition, single replacement, double replacement, combustion, neutralization, and redox reactions
  • Balancing equations with coefficients while preserving chemical formulas and state symbols
  • Explaining exothermic and endothermic reactions, activation energy, catalysts, collision theory, concentration, temperature, and surface area

How to use these practice tests

Read the equation from left to right, count each type of atom, and classify the pattern. When analyzing rate or energy, connect the observation to particle collisions and activation energy.

For more Grade 10 Science practice, return to the Grade 10 Science category.

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Grade 10 Chemical Reactions Practice Tests

Practice Grade 10 Science questions about evidence of chemical change, reactants, products, reaction types, balancing equations, conservation of atoms, catalysts, energy, and reaction rates.

Choose the best answer. Identify reactants and products, classify the reaction, balance atoms with coefficients, and analyze energy or rate changes.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What type of reaction is represented by 2H₂ + O₂ → 2H₂O?

Please select an answer first.

Correct answer: A

The correct answer is Synthesis.

  1. Identify the reaction concept: Determine whether the question asks about evidence, reactants, products, reaction type, balancing, energy, or reaction rate.
  2. Track the chemical change: Two reactants combine to form one compound product, which is a synthesis pattern.
  3. Check atoms and energy: The correct answer is Synthesis.

Two reactants combine to form one compound product, which is a synthesis pattern.

2. QuestionMultiple choice

What type of reaction is represented by CaCO₃ → CaO + CO₂?

Please select an answer first.

Correct answer: B

The correct answer is Decomposition.

  1. Identify the reaction concept: Determine whether the question asks about evidence, reactants, products, reaction type, balancing, energy, or reaction rate.
  2. Track the chemical change: One compound breaks into two simpler products, which is decomposition.
  3. Check atoms and energy: The correct answer is Decomposition.

One compound breaks into two simpler products, which is decomposition.

3. QuestionMultiple choice

What type of reaction is represented by Zn + CuSO₄ → ZnSO₄ + Cu?

Please select an answer first.

Correct answer: C

The correct answer is Single replacement.

  1. Identify the reaction concept: Determine whether the question asks about evidence, reactants, products, reaction type, balancing, energy, or reaction rate.
  2. Track the chemical change: Zinc replaces copper in the compound, following the single-replacement pattern.
  3. Check atoms and energy: The correct answer is Single replacement.

Zinc replaces copper in the compound, following the single-replacement pattern.

4. QuestionMultiple choice

What type of reaction is represented by AgNO₃ + NaCl → AgCl + NaNO₃?

Please select an answer first.

Correct answer: D

The correct answer is Double replacement.

  1. Identify the reaction concept: Determine whether the question asks about evidence, reactants, products, reaction type, balancing, energy, or reaction rate.
  2. Track the chemical change: The ions exchange partners to form two new compounds.
  3. Check atoms and energy: The correct answer is Double replacement.

The ions exchange partners to form two new compounds.

5. QuestionMultiple choice

What type of reaction is represented by CH₄ + O₂ → CO₂ + H₂O?

Please select an answer first.

Correct answer: A

The correct answer is Combustion.

  1. Identify the reaction concept: Determine whether the question asks about evidence, reactants, products, reaction type, balancing, energy, or reaction rate.
  2. Track the chemical change: A hydrocarbon reacts with oxygen to produce carbon dioxide, water, and energy.
  3. Check atoms and energy: The correct answer is Combustion.

A hydrocarbon reacts with oxygen to produce carbon dioxide, water, and energy.

6. QuestionMultiple choice

What are common products of an acid reacting with a base?

Please select an answer first.

Correct answer: B

The correct answer is Water and a salt.

  1. Identify the reaction concept: Determine whether the question asks about evidence, reactants, products, reaction type, balancing, energy, or reaction rate.
  2. Track the chemical change: Acid-base neutralization commonly produces H₂O and an ionic salt.
  3. Check atoms and energy: The correct answer is Water and a salt.

Acid-base neutralization commonly produces H₂O and an ionic salt.

7. QuestionMultiple choice

Which equation is balanced for sodium reacting with chlorine?

Please select an answer first.

Correct answer: C

The correct answer is 2Na + Cl₂ → 2NaCl.

  1. Identify the reaction concept: Determine whether the question asks about evidence, reactants, products, reaction type, balancing, energy, or reaction rate.
  2. Track the chemical change: The balanced equation has two sodium atoms and two chlorine atoms on each side.
  3. Check atoms and energy: The correct answer is 2Na + Cl₂ → 2NaCl.

The balanced equation has two sodium atoms and two chlorine atoms on each side.

8. QuestionMultiple choice

What product is expected when hydrochloric acid reacts with sodium hydroxide?

Please select an answer first.

Correct answer: D

The correct answer is Water and sodium chloride.

  1. Identify the reaction concept: Determine whether the question asks about evidence, reactants, products, reaction type, balancing, energy, or reaction rate.
  2. Track the chemical change: HCl + NaOH → H₂O + NaCl is an acid-base neutralization.
  3. Check atoms and energy: The correct answer is Water and sodium chloride.

HCl + NaOH → H₂O + NaCl is an acid-base neutralization.

9. QuestionMultiple choice

A reaction produces bubbles, a new solid, and a temperature change. What is the best conclusion?

Please select an answer first.

Correct answer: A

The correct answer is Multiple observations support that a chemical reaction occurred..

  1. Identify the reaction concept: Determine whether the question asks about evidence, reactants, products, reaction type, balancing, energy, or reaction rate.
  2. Track the chemical change: Gas, precipitate, and energy changes are strong evidence of chemical change when alternative explanations are excluded.
  3. Check atoms and energy: The correct answer is Multiple observations support that a chemical reaction occurred..

Gas, precipitate, and energy changes are strong evidence of chemical change when alternative explanations are excluded.

10. QuestionMultiple choice

Which word equation represents a synthesis reaction?

Please select an answer first.

Correct answer: B

The correct answer is Sodium + chlorine → sodium chloride.

  1. Identify the reaction concept: Determine whether the question asks about evidence, reactants, products, reaction type, balancing, energy, or reaction rate.
  2. Track the chemical change: Sodium and chlorine combine to form one product, sodium chloride.
  3. Check atoms and energy: The correct answer is Sodium + chlorine → sodium chloride.

Sodium and chlorine combine to form one product, sodium chloride.

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